Dns not updating from other dns
If you are using our name servers, the registrar points the browser to our DNS servers to determine the IP Address for your domain name.
From there the request is sent to the server the domain is hosted on which then provides the browser with the website.
Many of our KB (knowledge base) articles mention DNS propagation delay.
If the site is not listed in the records it queries registrars to find out who the DNS start of authority (SOA) is for your website.If you're using your registrar's name server as your SOA, it looks up the "A" record for your domain and returns the IP address of the server listed.This speeds up web surfing quite a bit by:(https:// Whats My DNS can show you a variety of different records (selectable from the dropdown), and show you in 'real time' where those records have propagated to.Most commonly you would use this to check if the A Record for your site has propagated out to the rest of the world.
To speed the loading of websites, each ISP caches a copy of DNS records for a period of time, sometimes up to 48 hours.
This means that they make their own copy of the registrars' master DNS records, and reads from them locally instead of making a direct request to the domain registrar every time a request for your site is made.